Editorial Commentary: High Variability Exists Among Different Techniques for Measuring Glenoid Bone Loss.

Glenoid bone loss is a predominant factor in determining proper surgical management for glenohumeral instability. Precise measurements of glenoid (and humeral) bone defects are fundamental, and millimeters matter. Three-dimensional computed tomography scans may provide the highest interobserver reliability for making these measurements. Yet, because imprecision in the range of millimeters is observed with even the most precise glenoid bone loss measurement techniques, it could be a mistake to over-rely, let alone solely rely, on glenoid bone loss measurement as the primary determinant for selecting one surgical procedure over another. Surgeons must measure glenoid bone loss but also thoughtfully consider patient age, associated soft-tissue injuries, and activity level, including throwing and participation in collision sports. When choosing the proper surgical procedure for a shoulder instability patient, we should not focus on only one variably measured parameter but, instead, on a comprehensive assessment of the patient.